Where Elementary Students Are Starting From
Elementary students are active network users. They stream videos, play online games, use classroom apps, and communicate digitally. What they almost entirely lack is any mental model for what a network is or how any of those activities actually work. Their working assumption is usually magical: "the Internet" is a place, and things happen there, and somehow their device is connected to it.
At K-5, the goal is not to replace that intuition with technical vocabulary. It is to replace "magic" with "rules and connections" — building an accurate sense that networks are made of physical things, that data travels as information, and that people make decisions about how networks work and who can use them.
Networks Are About Connections
The most fundamental concept to establish at this level is that a network is simply a set of connected devices that can share information. This is accessible and true. The classroom itself can be a model: if every student's computer can print to the same printer, they are on a network.
Unplugged Activity: Human Network
Have students stand in a circle, each holding a ball of yarn. The first student holds the end of the yarn, says their name, and tosses the ball to someone else while holding their piece. That student holds the strand, says their name, and tosses to someone else. Continue until a web of connections spans the group.
Now ask: if student A wants to send a message to student E, what paths are available? What happens if one connection (strand) is cut — can the message still get through? This introduces network topology, redundancy, and routing in entirely physical terms. The follow-up question — "who decides who can connect to whom?" — opens the conversation about network rules and access without any technical vocabulary.
Internet Safety Grounded in Technical Reality
Internet safety is already part of the K-5 curriculum in most schools. What Week 4 adds is a technical foundation for safety rules that students often experience as arbitrary adult restrictions.
"Don't talk to strangers online" becomes more meaningful when students understand that the Internet connects their device to millions of other devices, and they cannot see who is on the other end of a connection. "Don't share your password" connects to the account and access concepts from Topic 3c: your password is what proves to the network that you are you, and sharing it lets someone else pretend to be you.
"Not everything online is true" can be grounded in a brief, age-appropriate discussion of how websites work: anyone can build a website and put anything on it. The web server does not check whether the content is accurate before sending it to your browser.
What to avoid: Fear-based internet safety instruction (— "the Internet is dangerous; be careful") without technical grounding tends to produce anxiety rather than literacy. Students who understand why a rule exists are better equipped to apply it in new situations than students who simply memorize the rule.
Phishing at the Elementary Level
Elementary students are capable of understanding the core idea behind phishing: someone pretends to be someone else to trick you into giving them something. This maps onto social experiences students already have — a stranger claiming to know their parents, a message that seems too good to be true.
A simple classroom exercise: show students two emails side by side (real examples or teacher-constructed ones) — one legitimate, one a phishing attempt. Ask: how can you tell which is real? What questions would you ask before clicking anything? This builds the habit of skepticism without requiring any technical vocabulary beyond "email" and "link."
The key message for elementary students: when something online asks you to do something quickly, tell you that you won a prize, or asks for personal information — stop and ask a trusted adult before clicking or responding.
Connections to the Broader K-5 CS Curriculum
- Algorithms and rules: Networks follow rules (protocols) just like algorithms do. The idea that computers need precise, agreed-upon rules to communicate reliably reinforces the computational thinking strand that runs through K-5 CS education.
- Digital citizenship: Week 4 provides technical grounding for digital citizenship standards around privacy, safety, and responsible online behavior. Rules that previously seemed arbitrary now have explanations.
- Impacts of computing: The SEC scenarios — particularly the free tool scenario — touch on age-appropriate versions of questions about who benefits from technology and who might be harmed. Even young students can engage with the idea that apps collect information about them.